Addington was a federal electoral district in Ontario, Canada, that was represented in the House of Commons of Canada from 1867 to 1904. The electoral district was created in the British North America Act 1867.
The County of Addington consisted of the Townships of Camden, Portland, Sheffield, Hinchinbrooke, Kaladar, Kennebec, Olden, Oso, Angelsea, Barrie, Clarendon, Palmerston, Effingham, Abinger, Miller, Canonto, Denbigh, Loughborough, and Bedford.
In 1882, the township of Ashby was added to the riding.
The electoral district was abolished in 1904 when it was merged into Lennox and Addington riding.
This riding has elected the following members of Parliament:
On Mr. Shibley being unseated, on petition, 21 September 1874:
On Mr. Bell's death, 5 July 1901: